Abstract:The contents of l-ephedrine in Rhizonia Pinelliae have been detemiined to be approximately3. 44×10~3. The contents vary with the five different proressing methods in the following order: Pinellia boiled withginger juice and alum>raw Pinellia>Pinellia dipped in ginger juice>Pinellia boiled only with ginger juice>Pinelliadipped in alum solution. The alum solution and the Pinellia boiled only with ginger juice bear most strongly on thel-ephedrine contents of Pinellia.